Bluetooth Controlled Lamp & Weather Station

Use your Phone to remotely control your lamp and find out what the weather's like.

Feb 24, 2022

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lights

embedded

home automation

Components and supplies

DHT11 Temperature & Humidity Sensor (4 pins)

Resistor 220 ohm

Rotary potentiometer (generic)

RGB Diffused Common Cathode

Jumper wires (generic)

HC-05 Bluetooth Module

Alphanumeric LCD, 16 x 2

Arduino UNO

Tools and machines

Breadboard, 400 Pin

Project description

Code

Arduino Code

c_cpp

1//An Arduino Uno Remote Bluetooth Control Project by Joel Varghese
2
3#include   <DHT.h>
4#include <LiquidCrystal.h>
5#define TYPE DHT11
6
7int rs=7; //setting   up lcd pins
8int en=8;
9int d4=9;
10int d5=10;
11int d6=11;
12int d7=12;
13
14int   sensePin=2; //dht sensor pin
15float humidity;
16float tempC;
17
18int setTime   = 500; //constants for time delay
19int dt=5000;
20
21String ic ; //bluetooth   incoming string
22int rPin = 6; //rgb led pin connections
23int gPin = 5;
24int   bPin = 4;
25int rBright=0;
26int bBright=0;
27int gBright=0;
28float dfact=1;
29
30LiquidCrystal   lcd(rs,en,d4,d5,d6,d7); //create an lcd object
31DHT ht(sensePin, TYPE); //create   a DHT sensor object
32
33void setup() {
34  Serial.begin(9600); //UART Communication
35   pinMode (rPin, OUTPUT); //setting RGB pins in output mode
36  pinMode (gPin,   OUTPUT);
37  pinMode (bPin, OUTPUT);
38  ht.begin(); //initializes the DHT SENSOR   
39  lcd.begin(16,2); //initializes the LCD display
40  
41  
42}
43
44void   loop() {
45  if (Serial.available() >0){ //we are waiting for a remote Bluetooth   control
46    ic = Serial.readString();
47    Serial.print(ic);
48    Serial.print("\
49");
50     
51    if (ic == "T") { //Temperature Display Mode has been clicked
52      lcd.noBlink();
53       Serial.print("Welcom");
54      lcd.print ("Welcome");
55      delay(2000);
56       lcd.clear();
57      humidity= ht.readHumidity();
58      tempC = ht.readTemperature   ();
59      lcd.setCursor(0,0);
60      lcd.print("Temp is ");
61      lcd.setCursor(2,1);
62       lcd.print(tempC);
63      lcd.print ("C");
64      delay(dt);
65      lcd.clear();
66       lcd.setCursor(0,0);
67      lcd.print("Humidity is ");
68      lcd.setCursor(2,1);
69       lcd. print (humidity);
70      delay(dt);
71      lcd.clear();
72      lcd.print("Thank   You");
73      delay(1000);
74      lcd.clear();
75    }
76
77    else if   (ic == "0"){ //Lamp Switch OFF
78      rBright=0;
79      bBright=0;
80      gBright=0;
81       dfact=0;
82      
83    } 
84    else if (ic == "7"){ //Lamp Switch ON
85       rBright=255;
86      bBright=255;
87      gBright=255;
88      dfact=1;
89       
90    }
91    
92    else if (ic == "Red"){
93      rBright=255;
94       bBright=0;
95      gBright=0;
96      dfact=1;
97    }
98    else if (ic==   "Blue"){
99      rBright=0;
100      bBright=255;
101      gBright=0;
102      dfact=1;
103     }
104    else if (ic == "Green"){
105      rBright=0;
106      bBright=0;
107       gBright=255;
108      dfact=1;
109    }
110     else if (ic== "Cyan"){
111       rBright=0;
112      bBright=255;
113      gBright=255;
114      dfact=1;
115     }
116      else if (ic == "Magenta"){
117      rBright=255;
118      bBright=255;
119       gBright=0;
120      dfact=1;
121    }
122     else if (ic == "Yellow"){
123       rBright=255;
124      bBright=0;
125      gBright=255;
126      dfact=1;
127     }
128   
129    
130      else if (ic =="25"){
131        dfact=0.25;
132       }
133      else if (ic =="50"){
134        dfact=0.5;
135      }
136      else   if (ic =="75"){
137        dfact=0.75;
138      }
139      else if (ic =="100"){
140         dfact=1;
141      }
142     
143     analogWrite(rPin, dfact*rBright);
144      analogWrite(gPin, dfact*gBright);
145     analogWrite(bPin, dfact*bBright);
146     }
147  }

//An Arduino Uno Remote Bluetooth Control Project by Joel Varghese

#include   <DHT.h>
#include <LiquidCrystal.h>
#define TYPE DHT11

int rs=7; //setting   up lcd pins
int en=8;
int d4=9;
int d5=10;
int d6=11;
int d7=12;

int   sensePin=2; //dht sensor pin
float humidity;
float tempC;

int setTime   = 500; //constants for time delay
int dt=5000;

String ic ; //bluetooth   incoming string
int rPin = 6; //rgb led pin connections
int gPin = 5;
int   bPin = 4;
int rBright=0;
int bBright=0;
int gBright=0;
float dfact=1;

LiquidCrystal   lcd(rs,en,d4,d5,d6,d7); //create an lcd object
DHT ht(sensePin, TYPE); //create   a DHT sensor object

void setup() {
  Serial.begin(9600); //UART Communication
   pinMode (rPin, OUTPUT); //setting RGB pins in output mode
  pinMode (gPin,   OUTPUT);
  pinMode (bPin, OUTPUT);
  ht.begin(); //initializes the DHT SENSOR   
  lcd.begin(16,2); //initializes the LCD display
  
  
}

void   loop() {
  if (Serial.available() >0){ //we are waiting for a remote Bluetooth   control
    ic = Serial.readString();
    Serial.print(ic);
    Serial.print("\
");
     
    if (ic == "T") { //Temperature Display Mode has been clicked
      lcd.noBlink();
       Serial.print("Welcom");
      lcd.print ("Welcome");
      delay(2000);
       lcd.clear();
      humidity= ht.readHumidity();
      tempC = ht.readTemperature   ();
      lcd.setCursor(0,0);
      lcd.print("Temp is ");
      lcd.setCursor(2,1);
       lcd.print(tempC);
      lcd.print ("C");
      delay(dt);
      lcd.clear();
       lcd.setCursor(0,0);
      lcd.print("Humidity is ");
      lcd.setCursor(2,1);
       lcd. print (humidity);
      delay(dt);
      lcd.clear();
      lcd.print("Thank   You");
      delay(1000);
      lcd.clear();
    }

    else if   (ic == "0"){ //Lamp Switch OFF
      rBright=0;
      bBright=0;
      gBright=0;
       dfact=0;
      
    } 
    else if (ic == "7"){ //Lamp Switch ON
       rBright=255;
      bBright=255;
      gBright=255;
      dfact=1;
       
    }
    
    else if (ic == "Red"){
      rBright=255;
       bBright=0;
      gBright=0;
      dfact=1;
    }
    else if (ic==   "Blue"){
      rBright=0;
      bBright=255;
      gBright=0;
      dfact=1;
     }
    else if (ic == "Green"){
      rBright=0;
      bBright=0;
       gBright=255;
      dfact=1;
    }
     else if (ic== "Cyan"){
       rBright=0;
      bBright=255;
      gBright=255;
      dfact=1;
     }
      else if (ic == "Magenta"){
      rBright=255;
      bBright=255;
       gBright=0;
      dfact=1;
    }
     else if (ic == "Yellow"){
       rBright=255;
      bBright=0;
      gBright=255;
      dfact=1;
     }
   
    
      else if (ic =="25"){
        dfact=0.25;
       }
      else if (ic =="50"){
        dfact=0.5;
      }
      else   if (ic =="75"){
        dfact=0.75;
      }
      else if (ic =="100"){
         dfact=1;
      }
     
     analogWrite(rPin, dfact*rBright);
      analogWrite(gPin, dfact*gBright);
     analogWrite(bPin, dfact*bBright);
     }
  }

Arduino Code

c_cpp

1//An Arduino Uno Remote Bluetooth Control Project by Joel Varghese
2
3#include  <DHT.h>
4#include <LiquidCrystal.h>
5#define TYPE DHT11
6
7int rs=7; //setting  up lcd pins
8int en=8;
9int d4=9;
10int d5=10;
11int d6=11;
12int d7=12;
13
14int  sensePin=2; //dht sensor pin
15float humidity;
16float tempC;
17
18int setTime  = 500; //constants for time delay
19int dt=5000;
20
21String ic ; //bluetooth  incoming string
22int rPin = 6; //rgb led pin connections
23int gPin = 5;
24int  bPin = 4;
25int rBright=0;
26int bBright=0;
27int gBright=0;
28float dfact=1;
29
30LiquidCrystal  lcd(rs,en,d4,d5,d6,d7); //create an lcd object
31DHT ht(sensePin, TYPE); //create  a DHT sensor object
32
33void setup() {
34  Serial.begin(9600); //UART Communication
35  pinMode (rPin, OUTPUT); //setting RGB pins in output mode
36  pinMode (gPin,  OUTPUT);
37  pinMode (bPin, OUTPUT);
38  ht.begin(); //initializes the DHT SENSOR  
39  lcd.begin(16,2); //initializes the LCD display
40  
41  
42}
43
44void  loop() {
45  if (Serial.available() >0){ //we are waiting for a remote Bluetooth  control
46    ic = Serial.readString();
47    Serial.print(ic);
48    Serial.print("\
49");
50    
51    if (ic == "T") { //Temperature Display Mode has been clicked
52      lcd.noBlink();
53      Serial.print("Welcom");
54      lcd.print ("Welcome");
55      delay(2000);
56      lcd.clear();
57      humidity= ht.readHumidity();
58      tempC = ht.readTemperature  ();
59      lcd.setCursor(0,0);
60      lcd.print("Temp is ");
61      lcd.setCursor(2,1);
62      lcd.print(tempC);
63      lcd.print ("C");
64      delay(dt);
65      lcd.clear();
66      lcd.setCursor(0,0);
67      lcd.print("Humidity is ");
68      lcd.setCursor(2,1);
69      lcd. print (humidity);
70      delay(dt);
71      lcd.clear();
72      lcd.print("Thank  You");
73      delay(1000);
74      lcd.clear();
75    }
76
77    else if  (ic == "0"){ //Lamp Switch OFF
78      rBright=0;
79      bBright=0;
80      gBright=0;
81      dfact=0;
82      
83    } 
84    else if (ic == "7"){ //Lamp Switch ON
85      rBright=255;
86      bBright=255;
87      gBright=255;
88      dfact=1;
89      
90    }
91    
92    else if (ic == "Red"){
93      rBright=255;
94      bBright=0;
95      gBright=0;
96      dfact=1;
97    }
98    else if (ic==  "Blue"){
99      rBright=0;
100      bBright=255;
101      gBright=0;
102      dfact=1;
103    }
104    else if (ic == "Green"){
105      rBright=0;
106      bBright=0;
107      gBright=255;
108      dfact=1;
109    }
110     else if (ic== "Cyan"){
111      rBright=0;
112      bBright=255;
113      gBright=255;
114      dfact=1;
115    }
116      else if (ic == "Magenta"){
117      rBright=255;
118      bBright=255;
119      gBright=0;
120      dfact=1;
121    }
122     else if (ic == "Yellow"){
123      rBright=255;
124      bBright=0;
125      gBright=255;
126      dfact=1;
127    }
128   
129    
130      else if (ic =="25"){
131        dfact=0.25;
132      }
133      else if (ic =="50"){
134        dfact=0.5;
135      }
136      else  if (ic =="75"){
137        dfact=0.75;
138      }
139      else if (ic =="100"){
140        dfact=1;
141      }
142     
143     analogWrite(rPin, dfact*rBright);
144     analogWrite(gPin, dfact*gBright);
145     analogWrite(bPin, dfact*bBright);
146    }
147  }

//An Arduino Uno Remote Bluetooth Control Project by Joel Varghese

#include  <DHT.h>
#include <LiquidCrystal.h>
#define TYPE DHT11

int rs=7; //setting  up lcd pins
int en=8;
int d4=9;
int d5=10;
int d6=11;
int d7=12;

int  sensePin=2; //dht sensor pin
float humidity;
float tempC;

int setTime  = 500; //constants for time delay
int dt=5000;

String ic ; //bluetooth  incoming string
int rPin = 6; //rgb led pin connections
int gPin = 5;
int  bPin = 4;
int rBright=0;
int bBright=0;
int gBright=0;
float dfact=1;

LiquidCrystal  lcd(rs,en,d4,d5,d6,d7); //create an lcd object
DHT ht(sensePin, TYPE); //create  a DHT sensor object

void setup() {
  Serial.begin(9600); //UART Communication
  pinMode (rPin, OUTPUT); //setting RGB pins in output mode
  pinMode (gPin,  OUTPUT);
  pinMode (bPin, OUTPUT);
  ht.begin(); //initializes the DHT SENSOR  
  lcd.begin(16,2); //initializes the LCD display
  
  
}

void  loop() {
  if (Serial.available() >0){ //we are waiting for a remote Bluetooth  control
    ic = Serial.readString();
    Serial.print(ic);
    Serial.print("\
");
    
    if (ic == "T") { //Temperature Display Mode has been clicked
      lcd.noBlink();
      Serial.print("Welcom");
      lcd.print ("Welcome");
      delay(2000);
      lcd.clear();
      humidity= ht.readHumidity();
      tempC = ht.readTemperature  ();
      lcd.setCursor(0,0);
      lcd.print("Temp is ");
      lcd.setCursor(2,1);
      lcd.print(tempC);
      lcd.print ("C");
      delay(dt);
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("Humidity is ");
      lcd.setCursor(2,1);
      lcd. print (humidity);
      delay(dt);
      lcd.clear();
      lcd.print("Thank  You");
      delay(1000);
      lcd.clear();
    }

    else if  (ic == "0"){ //Lamp Switch OFF
      rBright=0;
      bBright=0;
      gBright=0;
      dfact=0;
      
    } 
    else if (ic == "7"){ //Lamp Switch ON
      rBright=255;
      bBright=255;
      gBright=255;
      dfact=1;
      
    }
    
    else if (ic == "Red"){
      rBright=255;
      bBright=0;
      gBright=0;
      dfact=1;
    }
    else if (ic==  "Blue"){
      rBright=0;
      bBright=255;
      gBright=0;
      dfact=1;
    }
    else if (ic == "Green"){
      rBright=0;
      bBright=0;
      gBright=255;
      dfact=1;
    }
     else if (ic== "Cyan"){
      rBright=0;
      bBright=255;
      gBright=255;
      dfact=1;
    }
      else if (ic == "Magenta"){
      rBright=255;
      bBright=255;
      gBright=0;
      dfact=1;
    }
     else if (ic == "Yellow"){
      rBright=255;
      bBright=0;
      gBright=255;
      dfact=1;
    }
   
    
      else if (ic =="25"){
        dfact=0.25;
      }
      else if (ic =="50"){
        dfact=0.5;
      }
      else  if (ic =="75"){
        dfact=0.75;
      }
      else if (ic =="100"){
        dfact=1;
      }
     
     analogWrite(rPin, dfact*rBright);
     analogWrite(gPin, dfact*gBright);
     analogWrite(bPin, dfact*bBright);
    }
  }

Downloadable files

Circuit Diagram

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